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ABO blood types-parents and children blood group?
Each biological parent donates one of their two ABO alleles to their child. A mother who is blood type O can only pass an O allele to her son or daughter. A father who is blood type AB could pass either an A or a B allele to his son or daughter. This couple could have children of either blood type A (O from mother and A from father) or blood type B (O from mother and B from father). There are four major blood groups determined by the presence or absence of two antigens – A and B – on the surface of red blood cells:

    Group A – has only the A antigen on red cells (and B antibody in the plasma)
    Group B – has only the B antigen on red cells (and A antibody in the plasma)
    Group AB – has both A and B antigens on red cells (but neither A nor B antibody in the plasma)
    Group O – has neither A nor B antigens on red cells (but both A and B antibody are in the plasma)
In addition to the A and B antigens, there is a third antigen called the Rh factor, which can be either present (+) or absent ( – ). In general, Rh negative blood is given to Rh-negative patients, and Rh positive blood or Rh negative blood may be given to Rh positive patients.

    The universal red cell donor has Type O negative blood type.
    The universal plasma donor has Type AB positive blood type.

Blood Types and the Population

O positive is the most common blood type. Not all ethnic groups have the same mix of these blood types. Hispanic people, for example, have a relatively high number of O’s, while Asian people have a relatively high number of B’s.



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